diff options
| author | Samuel Li <samuel.li@amd.com> | 2013-04-09 01:25:47 +0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2013-04-09 18:31:31 +0400 |
| commit | a0a53aa8c7b491a43e2ef66786f9511bae8cbc35 (patch) | |
| tree | ba99c19682038634fece39989fef348baaebab1b /drivers/gpu/drm/radeon/rs690d.h | |
| parent | 7c1c7c18fc752b2a1d07597286467ef186312463 (diff) | |
| download | linux-a0a53aa8c7b491a43e2ef66786f9511bae8cbc35.tar.xz | |
drm/radeon: Use direct mapping for fast fb access on RS690
This patch allows the CPU to map the stolen vram segment
directly rather than going through the PCI BAR. This
significantly improves performance for certain workloads with
a properly patched ddx.
Use radeon.fastfb=1 to enable it (disabled by default).
Currently only supported on RS690, but support for RS780/880
and newer APUs may be added eventually.
Signed-off-by: Samuel Li <samuel.li@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/rs690d.h')
| -rw-r--r-- | drivers/gpu/drm/radeon/rs690d.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/rs690d.h b/drivers/gpu/drm/radeon/rs690d.h index 36e6398a98ae..8af3ccf20cc0 100644 --- a/drivers/gpu/drm/radeon/rs690d.h +++ b/drivers/gpu/drm/radeon/rs690d.h @@ -29,6 +29,9 @@ #define __RS690D_H__ /* Registers */ +#define R_00001E_K8_FB_LOCATION 0x00001E +#define R_00005F_MC_MISC_UMA_CNTL 0x00005F +#define G_00005F_K8_ADDR_EXT(x) (((x) >> 0) & 0xFF) #define R_000078_MC_INDEX 0x000078 #define S_000078_MC_IND_ADDR(x) (((x) & 0x1FF) << 0) #define G_000078_MC_IND_ADDR(x) (((x) >> 0) & 0x1FF) |